The natural reaction for householders is to fear the worst.

居民的自然反应是害怕最坏情况发生。

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When aware of anger arising in you, delay your reaction for a few seconds.

当你意识到你要生气时，一定要推迟几秒钟再做决定。

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With major life traumas, like losing a loved one, for instance, the mind's first reaction is denial.

面对人生的重大创痛，例如失去深爱的人，心理的第一反应就是拒绝接受。

《柯林斯英汉双解大词典》

To some,it is a natural reaction for a country that suffered so much from communism under the Soviet Union.

VOA: standard.2009.12.16

And from that, then you can look at enthalpies of reaction for countless numbers of reactions, right.

很多很多种化合物,利用这些你就可以研究,不计其数的反应的反应焓。

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So if we have a negative change in energy for any reaction as it's written, what that actually means is we're giving off energy as the reaction proceeds.

如果我们像这里写的这样,在任何一个反应过后，得，到的能量变化为负值,这就意味着我们在这个过程中放出了能量。

麻省理工公开课 - 化学原理课程节选

Panic is an understandable reaction for buyers who suddenly find that their insurance contracts are worthless.

ECONOMIST: Credit derivatives

Ashton was accused of a heavy-handed reaction for axing Cipriani after he was seen leaving a nightclub in the early hours of Thursday morning.

BBC: Ashton defends Cipriani decision

Personally, I would really like to see more umpire consultations after a close call rather than the knee jerk reaction for instant replay.

FORBES: The Plight of The Umpires And The Inevitability Of Instant Replay